Colonnaded Well

This photo reminds me of the underground Etruscan well in Perugia, Italy.

Unfortunately, there are no online photos of the Perugian well which -- due to the immense reservoir of gorgeous green water at the bottom of the built-into-stone "descent collonade" -- is even more spectacular than this unidentified structure.

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Pozzo Etrusco, Perugia

http://www.tripadvisor.com/Attraction_Review-g187907-d243482-Reviews-Pozzo_Etrusco_Etruscan_Well-Perugia_Province_of_Perugia_Umbria.html